<?php/** * Created by PhpStorm. * Author: zhaorui * Date: 2019/2/27 * Time: 10:55 */header('Content-Type:text/html;charset=utf-8');// 抽象策略接口abstract class Strategy{  abstract function wayToSchool();}//具體策略角色class BikeStrategy extends Strategy{  function wayToSchool()  {    echo "騎自行車去上學".PHP_EOL;  }}class BusStrategy extends Strategy{  function wayToSchool()  {    echo "乘公共汽車去上學".PHP_EOL;  }}class TaxiStrategy extends Strategy{  function wayToSchool()  {    echo "坐出租去上學".PHP_EOL;  }}// 環境角色class Context{  private $strategy;  function getStrategy($strategyName){    try{      $strategyReflection = new ReflectionClass($strategyName);      $this->strategy = $strategyReflection->newInstance();    }catch (ReflectionException $e){      $this->strategy = "";    }  }  function goToSchool(){    $this->strategy->wayToSchool();  }}// 測試$context  = new Context();$context->getStrategy('BusStrategy');$context->goToSchool();